Accession Number : AD0635239

Title :   SKIN FRACTION COEFFICIENTS OF COMPLIANT SURFACES IN TURBULENT FLOW.

Descriptive Note : Master's thesis.

Corporate Author : OKLAHOMA UNIV NORMAN

Personal Author(s) : Looney, William Robert

Report Date : 1966

Pagination or Media Count : 74

Abstract : From this experiment it may be concluded that flexible boundaries seem to substantially reduce skin friction in turbulent flow. Reductions of as much as 40-50% in skin friction were found in some experimental configurations. It is not possible to state that these lower values are a sole function of any one parameter such as viscosity, lateral tension, or longitudinal tension. The data indicates that the lowest skin friction depends upon the relation between these three variables as well asthe mass or thickness of the flexible membrane. The skin friction of the flexible boundaries appear to decrease as the kinematic viscosity increases, at least up to 8000 CS, the highest value tested. In general, the reduction of skin friction is accompanied by a reduction in turbulence intensity. (Author)

Descriptors :   (*SKIN FRICTION, REDUCTION), (*TURBULENCE, SKIN FRICTION), FLEXIBLE STRUCTURES, SURFACES, VISCOSITY, AIRFOILS

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE